Nice to see you again! How's going? Today I'll comeback with a Chopin etude: "Chromatic". I believe that it's one of the hardest Chopin's etude, because it's used to develop the weaker fingers (4th and 5th finger) to grow strong and independence, which is extremely hard for new people. Enjoy!

https://www.youtube.com/watch?v=ydXC11zvrR8